Publication Date:
2024-04-25
Description:
There is growing interest in the scientific community in reconstructing the paleoceanography of the Southern Ocean during the Oligocene-Miocene because these time intervals experienced atmospheric CO2 concentrations with relevance to our future. However, it has remained notoriously difficult to put the sedimentary archives used in these efforts into a temporal framework. This is at least partially due to the fact that the bio-events recorded in organic-walled dinoflagellate cysts (dinocysts), which often represent the only microfossil group preserved, have not yet been calibrated to the international time scale. We here present dinocyst ranges from Oligocene-Miocene sediments drilled offshore the Wilkes Land continental margin, East Antarctica (Integrated Ocean Drilling Program (IODP) Hole U1356A). In addition, we apply statistical means to test a priori assumptions about whether the recorded taxa were deposited in situ or were reworked from older strata. Moreover, we describe two new dinocyst species, Selenopemphix brinkhuisii sp. nov. and Lejeunecysta adeliensis sp. nov., which are identified as important markers for regional stratigraphic analysis. Finally, we calibrate all identified dinocyst events to the international time scale using independent age control from calcareous nannoplankton and magnetostratigraphy from IODP Hole U1356A, and propose a provisional dinoflagellate cyst zonation scheme for the Oligocene-Miocene of the Southern Ocean.
Keywords:
318-U1356A; Achilleodinium biformoides; Achomosphaera alcicornu; Acritarcha; Acritarcha, chorate; Acritarcha, microgranulate; Acritarcha, psilate sphere; Acritarcha, reticulate; Adnatosphaeridium sp.; Adnatosphaeridium spp.; Aiora fenestrata; Aireiana verrucosa; Alisocysta circumtabulata; Alterbidinium distinctum; Angiosperms; Apectodinium spp.; Arachnodinium antarcticum; Areoligera complex; Areoligera semicirculata; Ataxodinium spp.; Batiacasphaera; Batiacasphaera compta; Batiacasphaera hirsuta; Batiacasphaera micropapillata; Batiacasphaera minuta; Batiacasphaera sp.; Batiacasphaera sphaerica; Batiacasphaera spp.; Botryococcus; Brigantedinium complex; Brigantedinium pynei; Brigantedinium simplex; Brigantedinium sp.; Cerebrocysta bartonensis; Cerebrocysta delicata; Cerebrocysta sp.; Charlesdowniea clathrata; Charlesdowniea edwardsii; Cleistosphaeridium sp.; Cooksonidium capricornum; Cordosphaeridium fibrospinosum; Cordosphaeridium funiculatum; Cordosphaeridium minutum; Corrudinium; Corrudinium? labradori; Corrudinium incompositum; Corrudinium regulare; Corrudinium sp.; Counts; Cribroperidinium spp.; Cryodinium sp.; Cyclopsiella; Cymatiosphaera; Damassadinium crassimurata; Dapsilidinium spp.; Deflandrea antarctica; Deflandrea cygniformis; Deflandrea sp.; Deflandrea spp.; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Dinoflagellate cyst; Dinoflagellate cyst indeterminata; Dinoflagellate cyst in situ; Dinoflagellate cyst per unit mass; Dinoflagellate cyst reworked; Diphyes colligerum; Distatodinium sp.; DRILL; Drilling/drill rig; Edwardsiella sexispinosa; Eisenackia circumtabulata; Elytrocysta brevis; Elytrocysta sp.; Enneadocysta diktyostila; Enneadocysta multicornuta; Eocladopyxis tesselata; Exp318; Fibrocysta axialis; Foraminifera, linings; Fossils, pyritized; Gelatia inflata; Glaphyrocysta intricata; Glaphyrocysta pastielsii; Habibacysta; Halodinium; Heteraulacacysta leptalea; Histiocysta palla; Homotryblium spp.; Hystrichokolpoma bullatum; Hystrichokolpoma pusilla; Hystrichokolpoma rigaudiae; Hystrichokolpoma truncatum; Hystrichosphaeridium truswelliae; Hystrichosphaeridium tubiferum; Hystrichosphaeropsis obscura; Impagidinium; Impagidinium aculeatum; Impagidinium cantabrigiense; Impagidinium elegans; Impagidinium elongatum; Impagidinium maculatum; Impagidinium pacificum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium spp.; Impagidinium velorum; Impagidinium victorianum; Impagidinium waipawaensis; Integrated Ocean Drilling Program / International Ocean Discovery Program; Invertocysta tabulata; IODP; Islandinium spp.; Joides Resolution; Kenleyia spp.; Leiosphera; Lejeunecysta acuminata; Lejeunecysta adeliense; Lejeunecysta attenuata; Lejeunecysta complex; Lejeunecysta cowei; Lejeunecysta fallax; Lejeunecysta katatonos; Lejeunecysta rotunda; Lithology/composition/facies; Lycopodium (added); Lycopodium (counted); Malvinia escutiana; Manumiella druggii; Melitasphaeridium pseudorecurvatum; Membranophoridium perforatum; Nematosphaeropsis; Nematosphaeropsis labyrinthus; Nothofagus; Octodinium askiniae; Odontochitina spp.; Oligokolpoma galeottii; Operculodinium; Operculodinium? eirikianum; Operculodinium cf. eirikianum; Operculodinium cf. tiara; Operculodinium janduchenei; Operculodinium piaseckii; Operculodinium sp.; Operculodinium spp.; Paleocystodinium golzowense; Palynomorpha; Paralacaniella; Paucisphaeridium spp.; Pediastrum; Phthanoperidinium amoenum; Phthanoperidinium antarcticum; Phthanoperidinium echinatum; Pollen; Pollen, bisaccate; Polysphaeridium spp.; Prasinophytes; Protoperidinioid cyst; Protoperidinium complex; Protoperidinium sp.; Pterospermella; Pyxidinopsis fairhavensis; Pyxidinopsis reticulata; Pyxidinopsis sp.; Pyxidinopsis spp.; Pyxidinopsis tuberculata; Pyxidinopsis vesciculata; Reticulatosphaera actinocoronata; Rhombodinium sp.; Sample code/label; Sample mass; Schematophora obscura; Schematophora speciosa; Selenopemphix antarctica; Selenopemphix brinkhuisi; Selenopemphix cf. antarctica; Selenopemphix complex; Selenopemphix dioneacysta; Selenopemphix nephroides; Selenopemphix sp.; Selenopemphix undulata; Senegalinium spp.; Spinidinium luciae; Spinidinium macmurdoense; Spinidinium schellenbergii; Spiniferites; Spiniferites ramosus complex; Spiniferites sp.; Spores; Stoveracysta kakanuiensis; Stoveracysta ornata; Svalbardella; Tasmanites; Tectatodinium spp.; Thalassiphora pelagica; Tritonites; Turbiosphaera filosa; Turbiosphaera sagena; Unipontedinium aquaeductus; Vozzhenikovia; Vozzhennikovia apertura/ S. schellenbergii group; Vozzhennikovia netrona; Wetzeliella articulata; Wilkes Land
Type:
Dataset
Format:
text/tab-separated-values, 63528 data points
